/* EMV Stack — shared site styles. Layout: sticky header, centred content column, card grids for tools and posts, long-form article column. */
:root {
  --bg: #f4f5f7;
  --surface: #ffffff;
  --ink: #17202c;
  --muted: #5a6575;
  --line: #dde1e7;
  --accent: #9a6b14;
  --accent-soft: #f6ecd8;
  --tag-bg: #e9eef5;
  --tag-ink: #1d3a5f;
  --good: #1f7a4d;
  --good-soft: #e1f2e9;
  --bad: #b3261e;
  --bad-soft: #fbe6e4;
  --font-body: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #11151b; --surface: #181e26; --ink: #e6e9ee; --muted: #9aa4b2; --line: #2a323d;
    --accent: #e0b25a; --accent-soft: #3a2f1a; --tag-bg: #213046; --tag-ink: #b9d0ef;
    --good: #5fcf96; --good-soft: #17352a; --bad: #ff8a80; --bad-soft: #3d1d1b;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #11151b; --surface: #181e26; --ink: #e6e9ee; --muted: #9aa4b2; --line: #2a323d;
  --accent: #e0b25a; --accent-soft: #3a2f1a; --tag-bg: #213046; --tag-ink: #b9d0ef;
  --good: #5fcf96; --good-soft: #17352a; --bad: #ff8a80; --bad-soft: #3d1d1b;
  color-scheme: dark;
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body { background: var(--bg); color: var(--ink); font-family: var(--font-body); font-size: 16px; line-height: 1.6; }
a { color: var(--tag-ink); text-underline-offset: 2px; }
a:hover { color: var(--accent); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
img { max-width: 100%; }

/* Header and footer */
.site-header { position: sticky; top: 0; z-index: 10; background: var(--surface); border-bottom: 1px solid var(--line); }
.site-header .in { max-width: 1040px; margin: 0 auto; padding: 10px 20px; display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.site-logo { display: flex; align-items: center; gap: 9px; text-decoration: none; color: var(--ink); font-weight: 700; font-size: 1.05rem; letter-spacing: -0.01em; }
.site-logo .dev { color: var(--muted); font-weight: 500; }
.site-chip { width: 26px; height: 20px; border-radius: 4px; flex: none; background: linear-gradient(135deg, var(--accent), var(--accent-soft)); border: 1px solid var(--accent); position: relative; }
.site-chip::before, .site-chip::after { content: ""; position: absolute; background: var(--surface); opacity: .55; }
.site-chip::before { left: 33%; right: 33%; top: 0; bottom: 0; }
.site-chip::after { top: 45%; height: 1px; left: 0; right: 0; }
.site-nav { display: flex; gap: 4px; margin-left: auto; flex-wrap: wrap; }
.site-nav a { text-decoration: none; color: var(--muted); font-weight: 500; font-size: .93rem; padding: 6px 11px; border-radius: 7px; }
.site-nav a:hover { color: var(--ink); background: var(--bg); }
.site-nav a[aria-current="page"] { color: var(--ink); background: var(--accent-soft); }
.site-footer { border-top: 1px solid var(--line); background: var(--surface); margin-top: 40px; }
.site-footer .in { max-width: 1040px; margin: 0 auto; padding: 24px 20px; display: grid; gap: 10px; font-size: .85rem; color: var(--muted); }
.site-footer nav { display: flex; gap: 16px; flex-wrap: wrap; }
.site-footer a { color: var(--muted); }

/* Page scaffolding */
.page { max-width: 1040px; margin: 0 auto; padding: 32px 20px 24px; display: grid; gap: 32px; }
.eyebrow { font-family: var(--font-mono); font-size: .78rem; color: var(--accent); text-transform: uppercase; letter-spacing: .08em; margin: 0; }
h1 { font-size: 2rem; line-height: 1.2; margin: 0; letter-spacing: -0.015em; text-wrap: balance; }
h2 { font-size: 1.3rem; line-height: 1.3; margin: 0; text-wrap: balance; }
h3 { font-size: 1.05rem; margin: 0; text-wrap: balance; }
.lede { color: var(--muted); font-size: 1.08rem; margin: 0; max-width: 62ch; }
.intro { display: grid; gap: 10px; }
.section { display: grid; gap: 16px; }
.section-h { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; }
.section-h a { margin-left: auto; font-size: .9rem; }

.hero { display: grid; gap: 14px; padding: 12px 0 4px; }
.hero h1 { font-size: 2.4rem; max-width: 20ch; }
.cta { display: flex; gap: 10px; flex-wrap: wrap; }
.btn { display: inline-block; text-decoration: none; font-weight: 600; font-size: .95rem; padding: 9px 16px; border-radius: 8px; border: 1px solid var(--line); background: var(--surface); color: var(--ink); cursor: pointer; font-family: inherit; }
.btn:hover { border-color: var(--accent); color: var(--ink); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
:root[data-theme="dark"] .btn.primary { color: #1a1408; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .btn.primary { color: #1a1408; } }

.hexstrip { font-family: var(--font-mono); font-size: .85rem; color: var(--muted); background: var(--surface); border: 1px solid var(--line); border-radius: 8px; padding: 10px 14px; overflow-x: auto; white-space: nowrap; }
.hexstrip b { color: var(--tag-ink); font-weight: 600; }
.hexstrip i { color: var(--accent); font-style: normal; }

.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 14px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 18px; display: grid; gap: 8px; align-content: start; text-decoration: none; color: var(--ink); }
a.card:hover { border-color: var(--accent); color: var(--ink); }
.card p { margin: 0; color: var(--muted); font-size: .93rem; }
.card .meta { font-size: .8rem; color: var(--muted); font-family: var(--font-mono); }
.card.soon { border-style: dashed; background: transparent; }
.tagchip { font-family: var(--font-mono); font-weight: 600; font-size: .78rem; background: var(--tag-bg); color: var(--tag-ink); padding: 1px 7px; border-radius: 5px; justify-self: start; }
.status { font-size: .75rem; font-weight: 600; padding: 2px 9px; border-radius: 999px; justify-self: start; }
.status.live { background: var(--good-soft); color: var(--good); }
.status.soon { background: var(--tag-bg); color: var(--muted); }

/* Articles */
.article { max-width: 720px; margin: 0 auto; padding: 32px 20px 24px; display: grid; gap: 18px; }
.article header { display: grid; gap: 10px; padding-bottom: 8px; border-bottom: 1px solid var(--line); }
.article .meta { font-size: .85rem; color: var(--muted); }
.prose { display: grid; gap: 16px; font-size: 1.02rem; }
.prose h2 { margin-top: 14px; }
.prose p, .prose ul, .prose ol { margin: 0; }
.prose li + li { margin-top: 6px; }
.prose code { font-family: var(--font-mono); font-size: .88em; background: var(--tag-bg); color: var(--tag-ink); padding: 1px 5px; border-radius: 4px; }
.prose pre { font-family: var(--font-mono); font-size: .86rem; line-height: 1.55; background: var(--surface); border: 1px solid var(--line); border-radius: 8px; padding: 14px; overflow-x: auto; margin: 0; }
.prose pre code { background: none; padding: 0; color: var(--ink); }
.table-wrap { overflow-x: auto; }
.prose table { border-collapse: collapse; width: 100%; font-size: .92rem; }
.prose th, .prose td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
.prose th { font-size: .78rem; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); }
.callout { background: var(--accent-soft); border-radius: 10px; padding: 14px 16px; display: grid; gap: 8px; }
.callout p { margin: 0; }
.ad-slot { display: none; } /* Replace with AdSense code after approval. */

/* Support */
.faq { display: grid; gap: 10px; }
.faq details { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 12px 16px; }
.faq summary { cursor: pointer; font-weight: 600; }
.faq details p { margin: 10px 0 0; color: var(--muted); }
.form { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 20px; display: grid; gap: 14px; max-width: 680px; }
.field { display: grid; gap: 5px; }
.field label { font-weight: 600; font-size: .9rem; }
.field .hint { font-size: .82rem; color: var(--muted); }
.field input, .field select, .field textarea { font: inherit; padding: 9px 12px; border: 1px solid var(--line); border-radius: 8px; background: var(--bg); color: var(--ink); }
.field textarea { min-height: 140px; resize: vertical; }
.field [aria-invalid="true"] { border-color: var(--bad); }
.two { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.notice { border-radius: 8px; padding: 12px 14px; font-size: .92rem; }
.notice.ok { background: var(--good-soft); color: var(--ink); }
.notice.err { background: var(--bad-soft); color: var(--bad); }

/* Plain pages */
.plain { max-width: 720px; margin: 0 auto; padding: 32px 20px 24px; display: grid; gap: 16px; }
.plain p, .plain ul { margin: 0; }

@media (max-width: 600px) {
  .page, .article, .plain { padding-top: 22px; }
  h1 { font-size: 1.6rem; }
  .hero h1 { font-size: 1.85rem; }
  .two { grid-template-columns: 1fr; }
  .site-nav { margin-left: 0; width: 100%; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; scroll-behavior: auto !important; } }

/* News */
.news-filters { display: flex; gap: 8px; flex-wrap: wrap; }
.news-filters button { font: inherit; font-size: .85rem; padding: 5px 12px; border-radius: 999px; border: 1px solid var(--line); background: var(--surface); color: var(--ink); cursor: pointer; }
.news-filters button:hover { border-color: var(--accent); }
.news-filters button[aria-pressed="true"] { background: var(--accent); border-color: var(--accent); color: var(--surface); font-weight: 600; }
.news-list { display: grid; gap: 12px; }
.news-item { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 16px 18px; display: grid; gap: 6px; }
.news-item[hidden] { display: none; }
.news-meta { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; font-size: .8rem; color: var(--muted); font-family: var(--font-mono); }
.news-cat { font-family: var(--font-body); font-size: .75rem; font-weight: 600; padding: 2px 9px; border-radius: 999px; background: var(--tag-bg); color: var(--tag-ink); }
.news-cat.c-emvco-bulletin { background: var(--accent-soft); color: var(--accent); }
.news-cat.c-business { background: var(--good-soft); color: var(--good); }
.news-item h3 { font-size: 1.02rem; }
.news-item p { margin: 0; color: var(--muted); font-size: .93rem; max-width: 75ch; }
.news-src { font-size: .85rem; }

/* Author box and related links */
.author-box { display: flex; gap: 14px; align-items: flex-start; background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 16px; }
.author-box p { margin: 0; color: var(--muted); font-size: .93rem; }
.author-box .author-name { color: var(--ink); font-weight: 600; margin-bottom: 4px; }
.author-avatar { flex: none; width: 44px; height: 44px; border-radius: 50%; background: var(--accent-soft); color: var(--accent); display: grid; place-items: center; font-weight: 700; font-size: .95rem; }
.related { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 16px 18px; display: grid; gap: 8px; }
.related h2 { font-size: 1.05rem; margin: 0; }
.related ul { margin: 0; padding-left: 18px; display: grid; gap: 4px; }

/* Glossary */
.gl-tools { display: grid; gap: 10px; }
.gl-tools input { font: inherit; padding: 9px 12px; border: 1px solid var(--line); border-radius: 8px; background: var(--surface); color: var(--ink); max-width: 420px; }
.gl-letters { display: flex; flex-wrap: wrap; gap: 4px; }
.gl-letters a { font-family: var(--font-mono); font-size: .85rem; text-decoration: none; padding: 3px 8px; border-radius: 6px; border: 1px solid var(--line); background: var(--surface); }
.gl-list { display: grid; gap: 10px; margin: 0; }
.gl-item { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 14px 16px; display: grid; gap: 4px; scroll-margin-top: 80px; }
.gl-item[hidden] { display: none; }
.gl-item dt { font-weight: 600; display: flex; gap: 10px; align-items: baseline; flex-wrap: wrap; }
.gl-item dd { margin: 0; color: var(--muted); font-size: .95rem; max-width: 75ch; }
.gl-item dd a { font-size: .88rem; }
.gl-item:target { border-color: var(--accent); box-shadow: 0 0 0 2px var(--accent-soft); }


/* Logo mark */
.site-mark { height: 26px; width: auto; flex: none; display: block; }

/* Cases */
.steps { margin: 0; padding-left: 20px; display: grid; gap: 6px; max-width: 70ch; color: var(--muted); }
.steps strong { color: var(--ink); }

/* Diagrams in articles and cases */
.prose figure.diagram { margin: 0; display: grid; gap: 8px; }
.prose figure.diagram img { display: block; width: 100%; height: auto; background: #fff; border: 1px solid var(--line); border-radius: 8px; }
.prose figure.diagram figcaption { font-size: .85rem; color: var(--muted); }

/* Site search */
.site-search-btn { margin-left: auto; display: inline-flex; align-items: center; gap: 8px; font: inherit; font-size: .9rem; color: var(--muted); background: var(--bg); border: 1px solid var(--line); border-radius: 8px; padding: 6px 10px; cursor: pointer; }
.site-search-btn:hover { border-color: var(--accent); color: var(--ink); }
.site-search-btn kbd { font-family: var(--font-mono); font-size: .75rem; border: 1px solid var(--line); border-radius: 4px; padding: 0 5px; background: var(--surface); }
.site-header .site-nav { margin-left: 0; }
html.search-open { overflow: hidden; }
.search-overlay { position: fixed; inset: 0; z-index: 50; background: rgba(10, 14, 20, .55); display: flex; justify-content: center; align-items: flex-start; padding: 8vh 16px 16px; }
.search-overlay[hidden] { display: none; }
.search-dialog { width: 100%; max-width: 640px; max-height: 80vh; display: flex; flex-direction: column; background: var(--surface); color: var(--ink); border: 1px solid var(--line); border-radius: 12px; box-shadow: 0 20px 60px rgba(0,0,0,.35); overflow: hidden; }
.search-bar { display: flex; align-items: center; gap: 10px; padding: 12px 14px; border-bottom: 1px solid var(--line); color: var(--muted); }
.search-bar input { flex: 1; min-width: 0; font: inherit; font-size: 1.05rem; border: 0; outline: none; background: transparent; color: var(--ink); }
.search-close { font: inherit; font-size: .75rem; font-family: var(--font-mono); color: var(--muted); background: var(--bg); border: 1px solid var(--line); border-radius: 5px; padding: 2px 7px; cursor: pointer; }
.search-status { margin: 0; padding: 8px 16px; font-size: .82rem; color: var(--muted); }
.search-results { list-style: none; margin: 0; padding: 0 8px 10px; overflow-y: auto; }
.search-results a { display: grid; gap: 2px; padding: 10px 10px; border-radius: 8px; text-decoration: none; color: var(--ink); }
.search-results a:hover, .search-results li[aria-selected="true"] a { background: var(--accent-soft); }
.search-kind { font-size: .72rem; font-family: var(--font-mono); text-transform: uppercase; letter-spacing: .05em; color: var(--accent); }
.search-snip { font-size: .86rem; color: var(--muted); }
.search-snip mark { background: var(--accent-soft); color: var(--ink); border-radius: 3px; padding: 0 2px; }
@media (max-width: 600px) {
  .site-search-btn span, .site-search-btn kbd { display: none; }
  .site-search-btn { padding: 7px 9px; }
  .search-overlay { padding-top: 12px; }
}

/* Search hits on the destination page */
mark.search-hit { background: #ffe9a8; color: #17202c; border-radius: 3px; padding: 0 1px; }
mark.search-hit.current { background: #f5b82e; outline: 2px solid var(--accent); outline-offset: 1px; }
.search-hitbar { position: fixed; z-index: 40; left: 50%; bottom: 16px; transform: translateX(-50%); display: flex; align-items: center; gap: 6px; padding: 6px 8px 6px 14px; background: var(--surface); color: var(--ink); border: 1px solid var(--line); border-radius: 999px; box-shadow: 0 8px 30px rgba(0,0,0,.2); font-size: .88rem; max-width: calc(100% - 32px); }
.search-hitcount { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; margin-right: 4px; }
.search-hitbar button { font: inherit; width: 32px; height: 32px; border-radius: 50%; border: 1px solid var(--line); background: var(--bg); color: var(--ink); cursor: pointer; flex: none; }
.search-hitbar button:hover { border-color: var(--accent); }